Lots of flowers are found in Greek territories (8)
I believe the answer is:
garlands
'lots of flowers' is the definition.
(a garland is a chain of flowers)
'are found in greek territories' is the wordplay.
'are' becomes 'a' (short for 'are', historical unit of measurement).
'found in' means one lot of letters goes inside another.
'greek' becomes 'gr' (abbreviation for Greek).
'territories' becomes 'lands' (land is a kind of territory).
'a' put inside 'gr' is 'gar'.
'gar'+'lands'='GARLANDS'
(Other definitions for garlands that I've seen before include "Circular bands of flowers" , "flower arrangements" , "Wreaths of flowers" , "Festive wreaths" .)